Shock absorber for railway car trucks



July l5, 1952 G. E. DATH SHOCK ABsoRBER FoR RAILWAY CAR TRUCKS Filed April 9, 1949 2 SHEETS-SHEET l Nwk A *1.... T5 m M A L InVen/L/or: Gegge 2 5 July 15, 1952 G. E. DATH SHOCK ABSORBER FOR RAILWAY CAR TRUCKS Filed April 9, 1949 2 SHEETS-SHEET 2 Ira/e nr: Geit/ge l?.1 .llapf/ h.

the shoulders l-I 5 of the casing to llimit 1engthf4 wise vertical separation of the casing and shoes B-B. y

` The rubber core D occupies the space between the sections lB-IB of the post C and holds thel latter expanded to press the shoes apart against the friction surfaces of the casing. The core D is under initial compression inthe-assembled condition of the parts of the mechanisrmand inturned flanges 24--24 and 25-25 at the top posing lengthwise movement of the casing and post toward each other.

2. In a friction shock absorber, the combination with a friction casing having opposed, interior, lengthwise extending friction surfaces; of a follower at one end ofn the mechanism rigid with said casingj "a frictionr unitslidingly telescoped within the-casing; -followersat the other end of the mechanism rigid with said unit, said unit including a two part, lengthwise split post.

l friction shoes embracing the post on opposite and bottom ends, respectively, ofi the sections of the post confine the core against vertical displacement with respect to the post.

The spring resistance 'E is in the form of a coil spring member surrounding the vcasing A and having its top and bottomends bearing,

respectively, onv the flange l2 of the casing-A and the flanges I 'l--I'I of the sections vlli-lli of the post C, v

As will be understood by those skilled inA this.

art.' the snubbing device shown in the'drawings is substituted for one of the spring coils" or sets of coils of a cluster of truck'springs of 'a raillway car, AandV cooperates with the top and bottom spring follower plates of the spring cluster, the usual spring centering projection of the top spring follower plate being accommodated within the opening il 4in the top wall of the casing A, and the spring centering projection on the bottom spring follower platebeing accom-V shoes BLB will be forced inwardly of the fric-f tioncasing1 A opposed by the spring E. Due to the friction existing between the shoes and the friction surfaces of the casing A, relative movement of these partsfis frictionally opposed and the action of the springs of the cluster effectively: snubbed. When the coils of the truck'spring cluster expand and the springfollower plates4 of saidj cluster are moved apart, the friction shoes B-B and the casing A will also be forced apartvby the expansive action ofthe spring'lJ,`V which reacts against the flange I2 of the casing A and the flanges `I'l--I'l of the sections Iii- I6 of the split post C.

`Ic1aim:i v f `1. In a friction shock absorber, the combina? tion with a friction casingrhaving opposed, vin#y terior, Vlengthwise extending friction'surfaces; of a follower at the outer end of the casing; a twopiece, lengthwise split post movable lengthwise with respect to the casing; a follower at the outer. end of each section of the post; a pair oflengthwise extending, opposed friction shoes interposed between said split post and the friction surfaces of the casing, each of said shoes Y overlapping both pieces of said two piece post; a rubbery core under compression between the sectionsof said post; and spring means interposed between ithe followers of said casing and post; yieldingly op- Sides and having sliding engagement with the friction surfaces ofthe casing, each of said shoes overlapping bothpart's of said two piece post,`

and interlocking means of fiange and groove formation on said post and shoes for holding f the shoes .against lengthwise movement with respectto the post; a rubber core under compression between said parts of the post; and spring means bearing on opposite ends on said followers yieldingly opposing lengthwise movement of the post and casing toward each other, 3. In a frictionshock absorber, the combination with a friction casing having opposed, in

shoes against lengthwise movement with respect' to the post; a rubber core under lateral compression between the sections of said post; fand spring means'bearing` at opposite ends on the follower of the casing and the followers of said sections of the post for yieldingly opposing lengthwise movement of the casing and postto-r ward each-foth'er. 'fy `4. In a friction shock absorber, the combina- 'tionj with; acylindrical-friction casing having opposed,` interior, transversely curved friction surfaces at its inner end extendinglengthwise of said" casing; ofy a follower atthe -outer end of said casing; a lengthwise split post movable lengthwise-with respect Yto the casing, said post comprisin'gftwo-similar, transversely c urved sections, eachl section having a follower at its outer Vend;v aA pair ofopposed, transversely curved fricti'onshoesA interposed between said split post and the frictionv surfaces of the casing; an inwardly' projecting, lengthwise extending wall onV each shoe engaged between the opposed vside edges of the sections of said post ;-V a rubber core under compression between the sections of the post; and spring means bearing at opposite ends on said follower of the casing and' said followers of the split post for yieldingly opposing lengthwise movement ofthe post and casing toward each other. 1 y

5.'In a friction shock absorber, the combina! tion with a cylindrical' friction casing having' opposed, interior, transversely curved friction surfaces at one end extending lengthwisel ofsaid cashing; of a follower atV the oppositeend of said casing; a lengthwise split post movablelengthwise with respect to thev casing',j said. post come prising two similar, transversely curved sections, each section having a follower at itsouter end; a 'pair' of opposed,Y transversely curved friction shoes interposed between said split post vand the friction surfaces of the casing; a lengthwise extending, inwardly projecting wall oneach shoe REFERENCES CITED .e extending between opposite Side edges of ad- The following references are of record in the jacent shoes; interlocking means on said post me 0f this 'Patenti and shoes for holding said shoes against move- 5 UNITED STATES PATENTS ment lengthwise of said post; a rubber core un- Number Name Date der compression between the sections of the post, 1 985 369 Fuchs Dee 25 1934 and spring means bearing at opposite ends 0n 2199'145 Watson' n Apr' so' 1940 said follower of the casing and the followers 2216231 Benner Tun- Oet 1 1940 of the sections of said post for yeldingly OP- 10 213811404 Cottreu "Aug: 7: 1945 posing lengthwise movement of the post and cas-4 ing toward each other. e

GEORGE E.. DATH. 

